Are Servos Powerful

[tomnt12]

im an avid doctor who fan and im planning to build a 1/4 size dalek out of MDF anf HDF. i am planning to build a traingular base with RC to mount it on but i need to know whether servos are powerful enough (then which ones) or if i will need to use DC motors.
cheers
Tom

[Steve Joblin]

some servos are pretty powerful, but they can also get expensive... for something of the size and weight you are looking for, I would go with DC motors.

What are you an avid Doctor of?

[tomnt12]

sorry i meant an avid "Doctor Who" fan the british Sci-Fi Drama

[benji]

cheap ones (10 $) gethya around 4 kg.cm

[superchiku]

4 kgf / cm is quite a good amnt its like 40 N/cm so it will work

[tomnt12]

im probably loking to spend £20 or servos (2 of them) and one cheap one to turn the front wheel for steering

[paulstreats]

Maybe think abut using some light plastic to construct it with so it isnt too heavy. hdpe is as easy as machining mdf

[tomnt12]

will do i was thinking of aluminium or hdpe for the base and styrene or hdf for the dalek

[Admin]

http://www.societyofrobots.com/robot_faq.shtml#select_motor

I'd second the suggestion of using DC motors (geared down).